The mutations present in the pers and perL1 alleles (amino acid replacements S589N and V243D respectively) have been introduced into perTag:HA,Tag:polyHis.
Flies carrying perSL.T:Ivir\HA1,T:Zzzz\His6 in a per01 background are completely arrhythmic for locomotor activity under constant darkness conditions when raised at 18, 25 or 29[o]C. Under 12 hour light: 12 hour dark conditions the flies do not show the normal evening peak of locomotor activity characteristic of rhythmic flies with 24 hour periods.
Flies carrying perSL.T:Ivir\HA1,T:Zzzz\His6 in a wild-type background are highly arrhythmic under constant darkness conditions.
perSL.Tag:HA,Tag:polyHis fails to rescue per01
perSL.T:Ivir\HA1,T:Zzzz\His6 does not the arrhythmicity seen in per01 flies under constant darkness conditions (no rescue is seen at 18, 25 and 29[o]C).